1.	Simplify 1 Simplify the following expression: $$ -5\times2 + -1 - -6 - 2(-2)5 $$ Correct Answer $$ 15$$ or 15.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\left(2 - 2\right)}{-5(-3) - \left(5 + -4\right)} $$ Correct Answer $$ 0$$ or 0.0

3.	Fractions 1 Simplify the following expression: $$ \frac{3}{5} + \frac{2}{3} $$ Correct Answer $$ \frac{19}{15}$$ or 1.2666666666666666

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{5}{3}}{\frac{1}{4}} $$ Correct Answer $$ \frac{20}{3}$$ or 6.666666666666667

5.	Significant figures 1. Write the following to 5 significant figures: 0.000050677903 Correct Answer 0.000050678 or $$5.0678\times10^{-5}$$ 2. Write the following to 5 significant figures: 13.560232 Correct Answer 13.560 or $$1.3560\times10^{1}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 0.0334095 Correct Answer $$3.34\times10^{-2}$$ 2. Write the following in standard form to 2 significant digits: 3662.91 Correct Answer $$3.7\times10^{3}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 2245.4 Correct Answer $$2.245\times10^{3}$$ 2. Write the following in preferred standard form to 3 significant digits: 0.039961 Correct Answer $$40.0\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ 4 - 6 + -5\times5 - {\left(-6 - -2\right)}^{2} $$ Correct Answer $$ -43$$ or -43.0000

9.	Simplify 1 Simplify the following expression: $$ 2\times5 - \left(-2 - 3\right) + {\left(3 - 5\right)}^{2} $$ Correct Answer $$ 19$$ or 19.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{{\left(\frac{-1}{5}\right)}^{2}}{(-2) + -3 - 3} $$ Correct Answer $$ \frac{-1}{200}$$ or -0.00500000